CIAT MAJOR LINE 102A Manuel D'instructions page 37

Fitting and adjusting fresh air collars (accessory)
- Remove the washer from the pre-punched panel by cutting the attachment
points.
- Fasten the collar with or without controller using the 4 screws supplied.
- Either remove or leave on the shims needed to obtain the desired flow rate.
The flow rate ranges are given on the label on the casing.
- 2 shims for minimum flow, 1 shim for medium flow, no shims for maximum flow.
- The pressure difference must be between 50 and 100 Pa in order to obtain
the desired flow rate.
- Maintain the controller in the "BAS" (down) position.
HYDRAULIC CONNECTIONS
The coils are fitted with a 'female' hydraulic connection, a turning nut with a flat face
(1/2" and 3/4" in diameter, depending on the size) and an O ring (supplied with the
unit), an air bleed valve and a drain valve.
Water always flows into the bottom of the coil and exits at the top.
To install a control valve with a flat face (CIAT valve kit available) (fig. 8):
2-way valve: screw the valve and gasket provided directly on the hydraulic
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connections at the coil intake (at the bottom):
- 2-way valve, 2 pipe version (fig. 8a)
- 2-way valve, 4 pipe version (fig. 8b)
3-way valve + integrated bypass: add the copper pipe (delivered with the CIAT
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valve kit) before fitting the valve:
4-way valve, 2 pipe version (fig. 8c)
4-way valve, 4 pipe version (fig. 8d), onto the coil cooling connection.
Installation
To avoid damaging this coupling or the CIAT valve, never
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tighten to more than 3.5 daN.m of torque. Use 2 spanners, one
to hold and the other to tighten, to ensure the valve connection
seal is maintained.
Always fit the valve in the right direction. The direction of flow for
these CIAT valves should be A > AB (A being connected to the coil and AB to the
hydraulic network). The maximum allowable differential pressure for our valves (open
or closed) is 100 kPa. CIAT recommends not exceeding 60 kPa.
Recommendations on hydraulic connections
The design of a hydraulic network is crucial to the correct operation of the system.
Drain valves should therefore be placed at the appropriate points and in sufficient
number. In addition, strainers should be fitted, as well as drains at circuit high points,
balancing tees on each Major Line and, if necessary, discharge valves.
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EN